Revenue Recognition - Summary of RPOs, Attributable to Continuing Operations, by Segment (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations, Total	$ 16,375	$ 18,019
Remaining performance obligations, Percentage	100.00%	100.00%
NCSA [Member]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations, Total	$ 5,527	$ 6,250
Remaining performance obligations, Percentage	34.00%	35.00%
EARC [Member]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations, Total	$ 2,830	$ 3,089
Remaining performance obligations, Percentage	17.00%	17.00%
MENA [Member]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations, Total	$ 5,507	$ 5,890
Remaining performance obligations, Percentage	33.00%	33.00%
APAC [Member]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations, Total	$ 1,230	$ 1,450
Remaining performance obligations, Percentage	8.00%	8.00%
Storage Solutions [Member]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations, Total	$ 1,281	$ 1,340
Remaining performance obligations, Percentage	8.00%	7.00%