Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of Debt

	December 31, 2017				December 31, 2016
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Secured debt
Revolving credit facilities	$	4,694	$	4,713	$	8,503	$	8,498
Securitization notes payable	35,193		35,235		26,584		26,664
Total secured debt	39,887		39,948		35,087		35,162
Unsecured debt
Senior notes	36,820		37,969		26,737		27,304
Credit facilities	2,368		2,375		1,961		1,961
Other unsecured debt	1,642		1,645		778		780
Total unsecured debt	40,830		41,989		29,476		30,045
Total secured and unsecured debt	$	80,717	$	81,937	$	64,563	$	65,207
Fair value utilizing Level 2 inputs			$	79,623			$	62,951
Fair value utilizing Level 3 inputs			$	2,314			$	2,256

Schedule of Maturities of Long-term Debt

The following table presents the expected scheduled principal and interest payments under our contractual debt obligations:

	Years Ending December 31,
	2018		2019		2020		2021		2022		Thereafter		Total
Secured debt	$	19,348	$	12,406	$	6,203	$	1,775	$	227	$	—	$	39,959
Unsecured debt	5,154		6,083		8,493		6,027		5,096		10,477		41,330
Interest payments	2,373		1,653		1,149		787		532		1,144		7,638
	$	26,875	$	20,142	$	15,845	$	8,589	$	5,855	$	11,621	$	88,927