Commitments and Contingencies (Litigation) (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
---|---|---|
Commitments and Contingencies Disclosure [Abstract] | ||
Undiscounted liability related to premises asbestos claims | $ 11 | $ 11 |
Receivable for recoveries related to premises asbestos liabilities | $ 5 | $ 6 |