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Condensed Consolidating Financial Information of Guarantor Subsidiaries - CONDENSED CONSOLIDATING CASH FLOW INFORMATION (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities $ 3,024 $ 2,853 $ 2,209
Net cash used in investing activities (1,710) (4,551) (3,684)
Net cash used in financing activities (1,305) 1,397 1,497
Effect of foreign exchange rates 0 (8) 18
Net increase (decrease) in cash and cash equivalents 9 (309) 40
Cash and cash equivalents at beginning of year 43 352 312
Cash and cash equivalents at end of year 52 43 352
Eliminations      
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities 0 0 0
Net cash used in investing activities 0 0 0
Net cash used in financing activities 0 0 0
Effect of foreign exchange rates 0 0 0
Net increase (decrease) in cash and cash equivalents 0 0 0
Cash and cash equivalents at beginning of year 0 0 0
Cash and cash equivalents at end of year 0 0 0
Parent | Reportable Legal Entities      
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities 34 36 21
Net cash used in investing activities (34) (36) (21)
Net cash used in financing activities 0 0 0
Effect of foreign exchange rates 0 0 0
Net increase (decrease) in cash and cash equivalents 0 0 0
Cash and cash equivalents at beginning of year 0 0 0
Cash and cash equivalents at end of year 0 0 0
URNA | Reportable Legal Entities      
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities 2,720 3,116 2,291
Net cash used in investing activities (1,529) (4,308) (3,554)
Net cash used in financing activities (1,164) 1,170 1,265
Effect of foreign exchange rates 0 0 0
Net increase (decrease) in cash and cash equivalents 27 (22) 2
Cash and cash equivalents at beginning of year 1 23 21
Cash and cash equivalents at end of year 28 1 23
Guarantor Subsidiaries | Reportable Legal Entities      
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities 0 (1) (3)
Net cash used in investing activities 0 0 0
Net cash used in financing activities 0 1 3
Effect of foreign exchange rates 0 0 0
Net increase (decrease) in cash and cash equivalents 0 0 0
Cash and cash equivalents at beginning of year 0 0 0
Cash and cash equivalents at end of year 0 0 0
Foreign | Reportable Legal Entities      
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities 167 (16) 132
Net cash used in investing activities (147) (207) (109)
Net cash used in financing activities (38) (56) (3)
Effect of foreign exchange rates 0 (8) 18
Net increase (decrease) in cash and cash equivalents (18) (287) 38
Cash and cash equivalents at beginning of year 42 329 291
Cash and cash equivalents at end of year 24 42 329
SPV | Reportable Legal Entities      
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities 103 (282) (232)
Net cash used in investing activities 0 0 0
Net cash used in financing activities (103) 282 232
Effect of foreign exchange rates 0 0 0
Net increase (decrease) in cash and cash equivalents 0 0 0
Cash and cash equivalents at beginning of year 0 0 0
Cash and cash equivalents at end of year $ 0 $ 0 $ 0