Basic and Diluted Earnings Per Share (Table) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share, Basic and Diluted [Abstract]
Net earnings (loss)	$ 53	$ 128	$ 225	$ 246
Weighted-average common shares outstanding (in shares)	40.7	41.7	40.6	41.6
Dilutive weighted-average common shares outstanding (in shares)	40.7	41.7	40.6	41.6
Earnings (loss) per share - basic (in dollars per share)	$ 1.30	$ 3.07	$ 5.54	$ 5.91
Earnings (loss) per share - diluted (in dollars per share)	$ 1.30	$ 3.07	$ 5.54	$ 5.91