Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income attributable to Cameron stockholders	$ 125	$ 187	$ 140	$ 49	$ 254	$ 225	$ 221	$ 111	$ 501	$ 811	$ 699
Average shares outstanding (basic) (in shares)									192	204	242
Common stock equivalents (in shares)									1	1	2
Shares utilized in diluted earnings per share calculation (in shares)									193	205	244
Earnings per share attributable to Cameron stockholders [Abstract]
Basic earnings per share (in dollars per share)	$ 0.65	$ 0.98	$ 0.73	$ 0.25	$ 1.30	$ 1.12	$ 1.08	$ 0.51	$ 2.61	$ 3.98	$ 2.89
Diluted earnings per share (in dollars per share)	$ 0.65	$ 0.97	$ 0.73	$ 0.25	$ 1.28	$ 1.11	$ 1.08	$ 0.51	$ 2.60	$ 3.96	$ 2.87