Share Owners' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 31, 2018	Dec. 31, 2017
Increase (Decrease) in Share Owners' Equity
Balance	$ 927	$ 363
Reissuance of common stock	$ 1	$ 3
Reissuance of common stock (in shares)	31,468	199,478
Treasury shares purchased	$ (45)
Treasury shares purchased (in shares)	1,999,759
Stock compensation	$ 5	$ 3
Net earnings	103	53
Other comprehensive income	128	194
Balance	$ 1,119	$ 616
Repurchase of common stock			$ 400
Common Stock, Number of Shares, Par Value and Other Disclosures
Common stock, shares authorized	250,000,000
Common stock, par value (in dollars per share)	$ 0.01
Shares of common stock issued (including treasury shares)	186,324,000	185,616,000		185,728,000
Treasury stock, shares	24,617,000	22,918,000		22,649,000
Common Stock
Increase (Decrease) in Share Owners' Equity
Balance	$ 2	$ 2
Balance	2	2
Capital in Excess of Par Value
Increase (Decrease) in Share Owners' Equity
Balance	3,099	3,080
Stock compensation	5	3
Balance	3,104	3,083
Treasury Stock
Increase (Decrease) in Share Owners' Equity
Balance	(551)	(560)
Reissuance of common stock	1	3
Treasury shares purchased	(45)
Balance	(595)	(557)
Retained Earnings
Increase (Decrease) in Share Owners' Equity
Balance	84	(96)
Net earnings	98	49
Balance	182	(47)
Accumulated Other Comprehensive Loss.
Increase (Decrease) in Share Owners' Equity
Balance	(1,826)	(2,172)
Other comprehensive income	122	191
Balance	(1,704)	(1,981)
Non-Controlling Interests
Increase (Decrease) in Share Owners' Equity
Balance	119	109
Net earnings	5	4
Other comprehensive income	6	3
Balance	$ 130	$ 116