Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Summarized financial information [Abstract]
Revenue	$ 5,228	$ 5,064	$ 15,708	$ 14,136
Profit (Loss) Before Taxes	413	707	1,554	1,839
Industrial Services [Member]
Summarized financial information [Abstract]
Revenue	193	199	594	547
Profit (Loss) Before Taxes	13	32	58	80
Total Operations [Member]
Summarized financial information [Abstract]
Revenue	5,228	5,064	15,708	14,136
Profit (Loss) Before Taxes	521	883	1,939	2,251
Corporate and Other [Member]
Summarized financial information [Abstract]
Revenue	0	0	0	0
Profit (Loss) Before Taxes	(59)	(78)	(232)	(208)
Interest Expense, net [Member]
Summarized financial information [Abstract]
Revenue	0	0	0	0
Profit (Loss) Before Taxes	(49)	(58)	(153)	(164)
Loss On early extinguishment of debt [Member]
Summarized financial information [Abstract]
Revenue	0	0	0	0
Profit (Loss) Before Taxes	0	(40)	0	(40)
North America [Member]
Summarized financial information [Abstract]
Revenue	2,742	2,721	8,277	7,451
Profit (Loss) Before Taxes	288	602	1,046	1,491
Latin America [Member]
Summarized financial information [Abstract]
Revenue	583	570	1,760	1,588
Profit (Loss) Before Taxes	45	71	189	204
Europe / Africa / Russia Caspian [Member]
Summarized financial information [Abstract]
Revenue	866	863	2,684	2,462
Profit (Loss) Before Taxes	104	103	413	235
Middle East / Asia Pacific [Member]
Summarized financial information [Abstract]
Revenue	844	711	2,393	2,088
Profit (Loss) Before Taxes	$ 71	$ 75	$ 233	$ 241