Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Apr. 01, 2016	Dec. 31, 2015
Comprehensive Income (Loss) [Abstract]
Discount rate - used at year end to value obligation (in hundredths)		4.00%	4.50%
Other comprehensive income (loss) before reclassifications	$ 105