Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions		Dec. 31, 2017		Dec. 31, 2016
Common stock, par value (in dollars per share)		$ 5		$ 5
Common stock, authorized (shares)		800,000,000		800,000,000
Common stock, issued (shares)		542,000,000		542,000,000
Common stock held in treasury at cost (shares)		69,000,000		57,000,000
Preferred Stock	[1]	$ 0.5	[2]	$ 0.5
Portion at Fair Value Measurement [Member]
Loans held for sale, fair value	[3]	1,700.0		2,400.0
Loans, fair value	[3]	900.0		900.0
Other assets, fair value	[3]	300.0		500.0
Other borrowed funds, fair value	[4]	$ 100.0		$ 100.0

[1] Par value less than $.5 million at each date.

[2] The par value of our preferred stock outstanding was less than $.5 million at each date and, therefore, is excluded from this presentation.

[3] Our consolidated assets included the following for which we have elected the fair value option: Loans held for sale of $1.7 billion, Loans of $.9 billion, and Other assets of $.3 billion at December 31, 2017 and Loans held for sale of $2.4 billion, Loans of $.9 billion, and Other assets of $.5 billion at December 31, 2016.

[4] Our consolidated liabilities included Other borrowed funds of $.1 billion at both December 31, 2017 and December 31, 2016, for which we have elected the fair value option.