Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings per share attributable to Cameron stockholders [Abstract]
Net income attributable to Cameron stockholders	$ 254	$ 225	$ 221	$ 111	$ 221	$ 189	$ 140	$ 149	$ 811	$ 699	$ 751
Average shares outstanding (basic) (in shares)									204	242	246
Common stock equivalents (in shares)									1	2	2
Shares utilized in diluted earnings per share calculation (in shares)									205	244	248
Earnings per share attributable to Cameron stockholders [Abstract]
Basic earnings per share (in dollars per share)	$ 1.30	$ 1.12	$ 1.08	$ 0.51	$ 0.96	$ 0.78	$ 0.57	$ 0.60	$ 3.98	$ 2.89	$ 3.05
Diluted earnings per share (in dollars per share)	$ 1.28	$ 1.11	$ 1.08	$ 0.51	$ 0.94	$ 0.78	$ 0.57	$ 0.60	$ 3.96	$ 2.87	$ 3.03