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Guarantor And Non-Guarantor Consolidating Condensed Financial Statements (Consolidating Condensed Statements Of Cash Flows) (Detail) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Supplemental Guarantor Financial Information [Line Items] |  |  |  |
Net cash provided by (used in) operating activities | $ 440 | $ 503 |  |
Property and equipment additions | (57) | (57) |  |
Proceeds received on asset sales | 2 | 4 |  |
Payments to Acquire Restricted Investments | (5) | (10) |  |
Other, net | (3) | (19) |  |
Net cash used in investing activities exclusive of vehicle programs | (63) | (82) |  |
Investment in vehicles | (4,376) | (4,226) |  |
Proceeds received on disposition of vehicles | 3,083 | 2,572 |  |
Repayments of Related Party Debt | (78) | 0 |  |
Net cash used in investing activities of vehicle programs | (1,371) | (1,654) |  |
Net cash used in investing activities | (1,434) | (1,736) |  |
Proceeds from long-term borrowings | 0 | 81 |  |
Principal payments on borrowings | (5) | (89) |  |
Proceeds from (Repayments of) Short-term Debt | 0 | (1) |  |
Repurchases of common stock | (4) | (14) |  |
Debt financing fees | 0 | (8) |  |
Other, net | 0 | 1 |  |
Net cash provided by financing activities exclusive of vehicle programs | (9) | (30) |  |
Proceeds from borrowings | 5,989 | 5,100 |  |
Principal payments on borrowings | (5,038) | (4,045) |  |
Debt financing fees | (5) | (1) |  |
Net cash provided by financing activities of vehicle programs | 946 | 1,054 |  |
Net cash provided by financing activities | 937 | 1,024 |  |
Effect of changes in exchange rates on cash and cash equivalents, program and restricted cash | (2) | 9 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect | (59) | (200) |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 676 | 701 | $ 735 | $ 901
Eliminations [Member] |  |  |  |
Supplemental Guarantor Financial Information [Line Items] |  |  |  |
Net cash provided by (used in) operating activities | 0 | (7) |  |
Property and equipment additions | 0 | 0 |  |
Proceeds received on asset sales | 0 | 0 |  |
Payments to Acquire Restricted Investments | 0 | 0 |  |
Other, net | 0 | 0 |  |
Net cash used in investing activities exclusive of vehicle programs | 0 | 0 |  |
Investment in vehicles | 0 | 0 |  |
Proceeds received on disposition of vehicles | 0 | 0 |  |
Repayments of Related Party Debt | 0 |  |  |
Net cash used in investing activities of vehicle programs | 0 | 0 |  |
Net cash used in investing activities | 0 | 0 |  |
Proceeds from long-term borrowings |  | 0 |  |
Principal payments on borrowings | 0 | 0 |  |
Proceeds from (Repayments of) Short-term Debt |  | 0 |  |
Repurchases of common stock | 0 | 0 |  |
Debt financing fees |  | 0 |  |
Other, net |  | 7 |  |
Net cash provided by financing activities exclusive of vehicle programs | 0 | 7 |  |
Proceeds from borrowings | 0 | 0 |  |
Principal payments on borrowings | 0 | 0 |  |
Debt financing fees | 0 | 0 |  |
Net cash provided by financing activities of vehicle programs | 0 | 0 |  |
Net cash provided by financing activities | 0 | 7 |  |
Effect of changes in exchange rates on cash and cash equivalents, program and restricted cash | 0 | 0 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect | 0 | 0 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 0 | 0 | 0 | 0
Non-Guarantor Subsidiaries [Member] |  |  |  |
Supplemental Guarantor Financial Information [Line Items] |  |  |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 664 | 675 |  |
Parent Company [Member] |  |  |  |
Supplemental Guarantor Financial Information [Line Items] |  |  |  |
Net cash provided by (used in) operating activities | 4 | 12 |  |
Property and equipment additions | 0 | 0 |  |
Proceeds received on asset sales | 0 | 0 |  |
Payments to Acquire Restricted Investments | 0 | 0 |  |
Other, net | 0 | 0 |  |
Net cash used in investing activities exclusive of vehicle programs | 0 | 0 |  |
Investment in vehicles | 0 | 0 |  |
Proceeds received on disposition of vehicles | 0 | 0 |  |
Repayments of Related Party Debt | 0 |  |  |
Net cash used in investing activities of vehicle programs | 0 | 0 |  |
Net cash used in investing activities | 0 | 0 |  |
Proceeds from long-term borrowings |  | 0 |  |
Principal payments on borrowings | 0 | 0 |  |
Proceeds from (Repayments of) Short-term Debt |  | 0 |  |
Repurchases of common stock | (4) | (14) |  |
Debt financing fees |  | 0 |  |
Other, net |  | 1 |  |
Net cash provided by financing activities exclusive of vehicle programs | (4) | (13) |  |
Proceeds from borrowings | 0 | 0 |  |
Principal payments on borrowings | 0 | 0 |  |
Debt financing fees | 0 | 0 |  |
Net cash provided by financing activities of vehicle programs | 0 | 0 |  |
Net cash provided by financing activities | (4) | (13) |  |
Effect of changes in exchange rates on cash and cash equivalents, program and restricted cash | 0 | 0 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect | 0 | (1) |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 1 | 3 | 1 | 4
Subsidiaries [Member] |  |  |  |
Supplemental Guarantor Financial Information [Line Items] |  |  |  |
Net cash provided by (used in) operating activities | 5 | 41 |  |
Property and equipment additions | (16) | (15) |  |
Proceeds received on asset sales | 0 | 2 |  |
Payments to Acquire Restricted Investments | 0 | (3) |  |
Other, net | 0 | 0 |  |
Net cash used in investing activities exclusive of vehicle programs | (16) | (16) |  |
Investment in vehicles | (1) | 0 |  |
Proceeds received on disposition of vehicles | 13 | 7 |  |
Repayments of Related Party Debt | 0 |  |  |
Net cash used in investing activities of vehicle programs | 12 | 7 |  |
Net cash used in investing activities | (4) | (9) |  |
Proceeds from long-term borrowings |  | 81 |  |
Principal payments on borrowings | (4) | (88) |  |
Proceeds from (Repayments of) Short-term Debt |  | 0 |  |
Repurchases of common stock | 0 | 0 |  |
Debt financing fees |  | (8) |  |
Other, net |  | (7) |  |
Net cash provided by financing activities exclusive of vehicle programs | (4) | (22) |  |
Proceeds from borrowings | 0 | 0 |  |
Principal payments on borrowings | (1) | (1) |  |
Debt financing fees | 0 | 0 |  |
Net cash provided by financing activities of vehicle programs | (1) | (1) |  |
Net cash provided by financing activities | (5) | (23) |  |
Effect of changes in exchange rates on cash and cash equivalents, program and restricted cash | 0 | 0 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect | (4) | 9 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 8 | 23 | 12 | 14
Guarantor Subsidiaries [Member] |  |  |  |
Supplemental Guarantor Financial Information [Line Items] |  |  |  |
Net cash provided by (used in) operating activities | 34 | 30 |  |
Property and equipment additions | (25) | (23) |  |
Proceeds received on asset sales | 0 | 0 |  |
Payments to Acquire Restricted Investments | (4) | (3) |  |
Other, net | 0 | 0 |  |
Net cash used in investing activities exclusive of vehicle programs | (29) | (26) |  |
Investment in vehicles | 0 | (1) |  |
Proceeds received on disposition of vehicles | 0 | 0 |  |
Repayments of Related Party Debt | 0 |  |  |
Net cash used in investing activities of vehicle programs | 0 | (1) |  |
Net cash used in investing activities | (29) | (27) |  |
Proceeds from long-term borrowings |  | 0 |  |
Principal payments on borrowings | 0 | (1) |  |
Proceeds from (Repayments of) Short-term Debt |  | 0 |  |
Repurchases of common stock | 0 | 0 |  |
Debt financing fees |  | 0 |  |
Other, net |  | 0 |  |
Net cash provided by financing activities exclusive of vehicle programs | 0 | (1) |  |
Proceeds from borrowings | 0 | 0 |  |
Principal payments on borrowings | (3) | (2) |  |
Debt financing fees | 0 | 0 |  |
Net cash provided by financing activities of vehicle programs | (3) | (2) |  |
Net cash provided by financing activities | (3) | (3) |  |
Effect of changes in exchange rates on cash and cash equivalents, program and restricted cash | 0 | 0 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect | 2 | 0 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 3 | 0 | 1 | 0
Subsidiaries Non Guarantor [Member] |  |  |  |
Supplemental Guarantor Financial Information [Line Items] |  |  |  |
Net cash provided by (used in) operating activities | 397 | 427 |  |
Property and equipment additions | (16) | (19) |  |
Proceeds received on asset sales | 2 | 2 |  |
Payments to Acquire Restricted Investments | (1) | (4) |  |
Other, net | (3) | (19) |  |
Net cash used in investing activities exclusive of vehicle programs | (18) | (40) |  |
Investment in vehicles | (4,375) | (4,225) |  |
Proceeds received on disposition of vehicles | 3,070 | 2,565 |  |
Repayments of Related Party Debt | (78) |  |  |
Net cash used in investing activities of vehicle programs | (1,383) | (1,660) |  |
Net cash used in investing activities | (1,401) | (1,700) |  |
Proceeds from long-term borrowings |  | 0 |  |
Principal payments on borrowings | (1) | 0 |  |
Proceeds from (Repayments of) Short-term Debt |  | (1) |  |
Repurchases of common stock | 0 | 0 |  |
Debt financing fees |  | 0 |  |
Other, net |  | 0 |  |
Net cash provided by financing activities exclusive of vehicle programs | (1) | (1) |  |
Proceeds from borrowings | 5,989 | 5,100 |  |
Principal payments on borrowings | (5,034) | (4,042) |  |
Debt financing fees | (5) | (1) |  |
Net cash provided by financing activities of vehicle programs | 950 | 1,057 |  |
Net cash provided by financing activities | 949 | 1,056 |  |
Effect of changes in exchange rates on cash and cash equivalents, program and restricted cash | (2) | 9 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect | (57) | (208) |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | $ 664 | $ 675 | $ 721 | $ 883

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- Definition Current year acquisitions of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, and production equipment; or the cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References No definition available. + Details
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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586 + Details
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- Definition Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585 + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585 + Details
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- Definition The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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