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v3.19.1

Income Per Common Share (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Numerator (basic and diluted): |  |
Net income | $ 116 | $ 149
Less: Allocation to unvested restricted stock awards | 1 | 1
Net income available to common shareholders | $ 115 | $ 148
Denominator: |  |
Basic common shares (based upon weighted average) (in shares) | 293 | 310
Add: Stock option dilution (in shares) | 1 | 3
Diluted common shares (in shares) | 294 | 313

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