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Business Segments and Geographic Areas - Business Segments (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]                      
Revenues $ 5,302 $ 4,863 $ 4,680 $ 4,376 $ 4,713 $ 4,307 $ 4,206 $ 3,968 $ 19,221 $ 17,194 $ 13,475
Operating profit                 3,199 3,389 2,809
Capital expenditures                 614 569 479
Depreciation and amortization                 738 616 549
Goodwill 9,049       7,172       9,049 7,172 6,151
Total assets 34,812       31,484       34,812 31,484 25,515
Discontinued Operations [Member]
                      
Segment Reporting Information [Line Items]                      
Goodwill 333       343       333 343 52
Total assets 2,183       2,373       2,183 2,373 829
Rig Systems [Member]
                      
Segment Reporting Information [Line Items]                      
Goodwill 1,279       1,097       1,279 1,097 943
Rig Aftermarket [Member]
                      
Segment Reporting Information [Line Items]                      
Goodwill 906       649       906 649 556
Wellbore Technologies [Member]
                      
Segment Reporting Information [Line Items]                      
Goodwill 4,425       3,769       4,425 3,769 3,683
Completion & Production Solutions [Member]
                      
Segment Reporting Information [Line Items]                      
Goodwill 2,106       1,314       2,106 1,314 917
Operating Segments [Member] | Rig Systems [Member]
                      
Segment Reporting Information [Line Items]                      
Revenues                 8,450 7,077 5,686
Operating profit                 1,594 1,685 1,562
Capital expenditures                 61 81 70
Depreciation and amortization                 82 64 61
Goodwill 1,279       1,097       1,279 1,097 943
Total assets 7,654       6,563       7,654 6,563 4,743
Operating Segments [Member] | Rig Aftermarket [Member]
                      
Segment Reporting Information [Line Items]                      
Revenues                 2,692 2,138 1,876
Operating profit                 729 594 528
Capital expenditures                 24 13 10
Depreciation and amortization                 26 18 14
Goodwill 906       649       906 649 556
Total assets 2,475       1,930       2,475 1,930 1,569
Operating Segments [Member] | Wellbore Technologies [Member]
                      
Segment Reporting Information [Line Items]                      
Revenues                 5,211 5,184 4,455
Operating profit                 915 983 726
Capital expenditures                 226 247 245
Depreciation and amortization                 420 389 381
Goodwill 4,425       3,769       4,425 3,769 3,683
Total assets 11,862       11,032       11,862 11,032 10,799
Operating Segments [Member] | Completion & Production Solutions [Member]
                      
Segment Reporting Information [Line Items]                      
Revenues                 4,309 3,994 2,483
Operating profit                 613 684 456
Capital expenditures                 212 169 103
Depreciation and amortization                 210 145 93
Goodwill 2,106       1,314       2,106 1,314 917
Total assets 7,287       6,192       7,287 6,192 4,020
Eliminations [Member]
                      
Segment Reporting Information [Line Items]                      
Revenues                 (1,441) (1,199) (1,025)
Operating profit                 (652) (557) (463)
Corporate, Non-Segment [Member]
                      
Segment Reporting Information [Line Items]                      
Capital expenditures                 91 59 51
Total assets $ 3,351       $ 3,394       $ 3,351 $ 3,394 $ 3,555