the pnc financial services group , inc . 2013 form 10-k 65 liquidity and capital management liquidity risk has two fundamental components . the first is potential loss assuming we were unable to meet our funding requirements at a reasonable cost . the second is the potential inability to operate our businesses because adequate contingent liquidity is not available . we manage liquidity risk at the consolidated company level ( bank , parent company and nonbank subsidiaries combined ) to help ensure that we can obtain cost-effective funding to meet current and future obligations under both normal 201cbusiness as usual 201d and stressful circumstances , and to help ensure that we maintain an appropriate level of contingent liquidity . management monitors liquidity through a series of early warning indicators that may indicate a potential market , or pnc-specific , liquidity stress event . in addition , management performs a set of liquidity stress tests over multiple time horizons with varying levels of severity and maintains a contingency funding plan to address a potential liquidity stress event . in the most severe liquidity stress simulation , we assume that our liquidity position is under pressure , while the market in general is under systemic pressure . the simulation considers , among other things , the impact of restricted access to both secured and unsecured external sources of funding , accelerated run-off of customer deposits , valuation pressure on assets and heavy demand to fund committed obligations . parent company liquidity guidelines are designed to help ensure that sufficient liquidity is available to meet our parent company obligations over the succeeding 24-month period . liquidity-related risk limits are established within our enterprise liquidity management policy and supporting policies . management committees , including the asset and liability committee , and the board of directors and its risk committee regularly review compliance with key established limits . in addition to these liquidity monitoring measures and tools described above , we also monitor our liquidity by reference to the liquidity coverage ratio ( lcr ) which is further described in the supervision and regulation section in item 1 of this report . pnc and pnc bank calculate the lcr on a daily basis and as of december 31 , 2018 , the lcr for pnc and pnc bank exceeded the fully phased-in requirement of 100% ( 100 % ) . we provide additional information regarding regulatory liquidity requirements and their potential impact on us in the supervision and regulation section of item 1 business and item 1a risk factors of this report . sources of liquidity our largest source of liquidity on a consolidated basis is the customer deposit base generated by our banking businesses . these deposits provide relatively stable and low-cost funding . total deposits increased to $ 267.8 billion at december 31 , 2018 from $ 265.1 billion at december 31 , 2017 driven by growth in interest-bearing deposits partially offset by a decrease in noninterest-bearing deposits . see the funding sources section of the consolidated balance sheet review in this report for additional information related to our deposits . additionally , certain assets determined by us to be liquid as well as unused borrowing capacity from a number of sources are also available to manage our liquidity position . at december 31 , 2018 , our liquid assets consisted of short-term investments ( federal funds sold , resale agreements , trading securities and interest-earning deposits with banks ) totaling $ 22.1 billion and securities available for sale totaling $ 63.4 billion . the level of liquid assets fluctuates over time based on many factors , including market conditions , loan and deposit growth and balance sheet management activities . our liquid assets included $ 2.7 billion of securities available for sale and trading securities pledged as collateral to secure public and trust deposits , repurchase agreements and for other purposes . in addition , $ 4.9 billion of securities held to maturity were also pledged as collateral for these purposes . we also obtain liquidity through various forms of funding , including long-term debt ( senior notes , subordinated debt and fhlb borrowings ) and short-term borrowings ( securities sold under repurchase agreements , commercial paper and other short-term borrowings ) . see note 10 borrowed funds and the funding sources section of the consolidated balance sheet review in this report for additional information related to our borrowings . total senior and subordinated debt , on a consolidated basis , decreased due to the following activity : table 24 : senior and subordinated debt .

Table:
in billions | 2018
january 1 | $ 33.3
issuances | 4.5
calls and maturities | -6.8 ( 6.8 )
other | -.1 ( .1 )
december 31 | $ 30.9
.

Question: assuming all matured securities were pledged as collateral , how much should we assume came from the calls?
Answer: 1.9
Calculation: subtract(6.8, 4.9)