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Segment Information - Summary of Revenue by Geographic Area (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of geographical areas [line items]      
REVENUE $ 5,071.1 $ 5,859.4 $ 6,203.9
North America [member]      
Disclosure of geographical areas [line items]      
REVENUE 2,959.0 3,337.9 3,910.7
Europe [member]      
Disclosure of geographical areas [line items]      
REVENUE 966.0 691.6 518.5
Asia Pacific [member]      
Disclosure of geographical areas [line items]      
REVENUE 432.0 859.5 787.2
Latin America, except Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 150.0 51.6 210.7
Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 443.0 748.9 663.3
Medical benefits plan subsidiaries abroad [member]      
Disclosure of geographical areas [line items]      
REVENUE 121.1 169.9 113.5
Operating Segment [member]      
Disclosure of geographical areas [line items]      
REVENUE 5,071.1 5,859.4 6,203.9
Operating Segment [member] | North America [member]      
Disclosure of geographical areas [line items]      
REVENUE 2,959.0 3,337.9 3,910.7
Operating Segment [member] | Europe [member]      
Disclosure of geographical areas [line items]      
REVENUE 966.0 691.6 518.5
Operating Segment [member] | Asia Pacific [member]      
Disclosure of geographical areas [line items]      
REVENUE 432.0 859.5 787.2
Operating Segment [member] | Latin America, except Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 150.0 51.6 210.7
Operating Segment [member] | Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 443.0 748.9 663.3
Operating Segment [member] | Medical benefits plan subsidiaries abroad [member]      
Disclosure of geographical areas [line items]      
REVENUE 121.1 169.9 113.5
Commercial Aviation [member]      
Disclosure of geographical areas [line items]      
REVENUE 2,358.3 2,771.4 2,916.9
Commercial Aviation [member] | Operating Segment [member]      
Disclosure of geographical areas [line items]      
REVENUE 2,358.3 2,771.4 2,916.9
Commercial Aviation [member] | Operating Segment [member] | North America [member]      
Disclosure of geographical areas [line items]      
REVENUE 1,449.4 1,795.5 2,157.3
Commercial Aviation [member] | Operating Segment [member] | Europe [member]      
Disclosure of geographical areas [line items]      
REVENUE 519.1 200.1 105.1
Commercial Aviation [member] | Operating Segment [member] | Asia Pacific [member]      
Disclosure of geographical areas [line items]      
REVENUE 324.1 670.3 581.6
Commercial Aviation [member] | Operating Segment [member] | Latin America, except Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 11.9 0.5 63.9
Commercial Aviation [member] | Operating Segment [member] | Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 0.2 0.9 (6.9)
Commercial Aviation [member] | Operating Segment [member] | Medical benefits plan subsidiaries abroad [member]      
Disclosure of geographical areas [line items]      
REVENUE 53.6 104.1 15.9
Defense and Security [member]      
Disclosure of geographical areas [line items]      
REVENUE 612.1 853.7 825.5
Defense and Security [member] | Operating Segment [member]      
Disclosure of geographical areas [line items]      
REVENUE 612.1 853.7 825.5
Defense and Security [member] | Operating Segment [member] | North America [member]      
Disclosure of geographical areas [line items]      
REVENUE 145.7 93.3 166.4
Defense and Security [member] | Operating Segment [member] | Europe [member]      
Disclosure of geographical areas [line items]      
REVENUE 122.8 133.5 99.3
Defense and Security [member] | Operating Segment [member] | Asia Pacific [member]      
Disclosure of geographical areas [line items]      
REVENUE 1.6 13.7 22.2
Defense and Security [member] | Operating Segment [member] | Latin America, except Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 68.3 5.4 (0.7)
Defense and Security [member] | Operating Segment [member] | Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 258.9 587.1 479.6
Defense and Security [member] | Operating Segment [member] | Medical benefits plan subsidiaries abroad [member]      
Disclosure of geographical areas [line items]      
REVENUE 14.8 20.7 58.7
Executive Jets [member]      
Disclosure of geographical areas [line items]      
REVENUE 1,104.4 1,280.3 1,553.3
Executive Jets [member] | Operating Segment [member]      
Disclosure of geographical areas [line items]      
REVENUE 1,104.3 1,280.3 1,553.3
Executive Jets [member] | Operating Segment [member] | North America [member]      
Disclosure of geographical areas [line items]      
REVENUE 936.7 1,006.8 1,147.7
Executive Jets [member] | Operating Segment [member] | Europe [member]      
Disclosure of geographical areas [line items]      
REVENUE 127.4 161.7 158.1
Executive Jets [member] | Operating Segment [member] | Asia Pacific [member]      
Disclosure of geographical areas [line items]      
REVENUE 1.6 94.1 98.4
Executive Jets [member] | Operating Segment [member] | Latin America, except Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 22.5 0.6 102.3
Executive Jets [member] | Operating Segment [member] | Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 16.1 17.1 46.7
Executive Jets [member] | Operating Segment [member] | Medical benefits plan subsidiaries abroad [member]      
Disclosure of geographical areas [line items]      
REVENUE     0.1
Service and support [member]      
Disclosure of geographical areas [line items]      
REVENUE 980.8 922.2 882.2
Service and support [member] | Operating Segment [member]      
Disclosure of geographical areas [line items]      
REVENUE 980.8 922.2 882.2
Service and support [member] | Operating Segment [member] | North America [member]      
Disclosure of geographical areas [line items]      
REVENUE 422.2 421.0 416.6
Service and support [member] | Operating Segment [member] | Europe [member]      
Disclosure of geographical areas [line items]      
REVENUE 196.7 196.3 156.0
Service and support [member] | Operating Segment [member] | Asia Pacific [member]      
Disclosure of geographical areas [line items]      
REVENUE 104.7 81.4 85.0
Service and support [member] | Operating Segment [member] | Latin America, except Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 47.3 45.1 45.2
Service and support [member] | Operating Segment [member] | Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE 157.2 133.3 140.6
Service and support [member] | Operating Segment [member] | Medical benefits plan subsidiaries abroad [member]      
Disclosure of geographical areas [line items]      
REVENUE 52.7 45.1 38.8
All Other Segments [member]      
Disclosure of geographical areas [line items]      
REVENUE 15.5 31.8 26.0
All Other Segments [member] | Operating Segment [member]      
Disclosure of geographical areas [line items]      
REVENUE 15.6 31.8 26.0
All Other Segments [member] | Operating Segment [member] | North America [member]      
Disclosure of geographical areas [line items]      
REVENUE 5.0 21.3 22.7
All Other Segments [member] | Operating Segment [member] | Brazil [member]      
Disclosure of geographical areas [line items]      
REVENUE $ 10.6 $ 10.5 $ 3.3