Real Estate and Accumulated Depreciation (Detail) (USD $) In Millions, unless otherwise specified					12 Months Ended																																																																	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013 Atlanta Marriott Perimeter Center	Dec. 31, 2013 Atlanta Marriott Suites Midtown	Dec. 31, 2013 Boston Marriott Copley	Dec. 31, 2013 Calgary Marriott	Dec. 31, 2013 Chicago Marriott O Hare	Dec. 31, 2013 Chicago Marriott Suites Downers Grove	Dec. 31, 2013 Chicago Marriott Suites O Hare	Dec. 31, 2013 Coronado Island Marriott Resort And Spa	Dec. 31, 2013 Costa Mesa Marriott	Dec. 31, 2013 Courtyard Chicago Downtown River North	Dec. 31, 2013 Courtyard Nashua	Dec. 31, 2013 Dayton Marriott	Dec. 31, 2013 Delta Meadowvale Hotel Conference Center	Dec. 31, 2013 Denver Marriott Tech Center Hotel	Dec. 31, 2013 Denver Marriott West	Dec. 31, 2013 Embassy Suites Chicago Downtown Lakefront	Dec. 31, 2013 Four Seasons Hotel Philadelphia	Dec. 31, 2013 Gaithersburg Marriott Washingtonian Center	Dec. 31, 2013 Grand Hyatt Atlanta In Buckhead	Dec. 31, 2013 Grand Hyatt Washington	Dec. 31, 2013 Greensboro Highpoint Marriott Airport	Dec. 31, 2013 Harbor Beach Marriott Resort & Spa	Dec. 31, 2013 Hilton Melbourne South Wharf	Dec. 31, 2013 Hilton Singer Island Oceanfront Resort	Dec. 31, 2013 Houston Airport Marriott At George Bush Intercontinental	Dec. 31, 2013 Houston Marriott At Texas Medical Center	Dec. 31, 2013 Hyatt Place Waikiki Beach	Dec. 31, 2013 Hyatt Regency Cambridge Overlooking Boston	Dec. 31, 2013 Hyatt Regency Maui Resort Spa	Dec. 31, 2013 Hyatt Regency Reston	Dec. 31, 2013 Hyatt Regency San Francisco Airport	Dec. 31, 2013 Hyatt Regency Washington On Capitol Hill	Dec. 31, 2013 Jw Marriott Atlanta Buckhead	Dec. 31, 2013 J W Marriott Desert Springs Resort Spa	Dec. 31, 2013 Jw Marriott Hotel Rio De Janeiro	Dec. 31, 2013 Jw Marriott Houston	Dec. 31, 2013 J W Marriott Mexico City	Dec. 31, 2013 J W Marriott Washington D C	Dec. 31, 2013 Kansas City Airport Marriott	Dec. 31, 2013 Key Bridge Marriott	Dec. 31, 2013 Manchester Grand Hyatt San Diego	Dec. 31, 2013 Manhattan Beach Marriott	Dec. 31, 2013 Marina Del Rey Marriott	Dec. 31, 2013 Marriott At Metro Center	Dec. 31, 2013 Memphis Marriott Downtown	Dec. 31, 2013 Miami Marriott Biscayne Bay	Dec. 31, 2013 Minneapolis Marriott City Center	Dec. 31, 2013 New Orleans Marriott	Dec. 31, 2013 New York Marriott Downtown	Dec. 31, 2013 New York Marriott Marquis	Dec. 31, 2013 Newark Liberty International Airport Marriott	Dec. 31, 2013 Newport Beach Marriott Bayview	Dec. 31, 2013 Newport Beach Marriott Hotel Spa	Dec. 31, 2013 New Zealand Hotel Portfolio	Dec. 31, 2013 Orlando World Center Marriott	Dec. 31, 2013 Park Ridge Marriott	Dec. 31, 2013 Philadelphia Airport Marriott	Dec. 31, 2013 Philadelphia Marriott Downtown	Dec. 31, 2013 Residence Inn Arlington Pentagon City	Dec. 31, 2013 San Antonio Marriott Rivercenter	Dec. 31, 2013 San Antonio Marriott Riverwalk	Dec. 31, 2013 San Cristobal Tower Santiago	Dec. 31, 2013 San Diego Marriott Hotel Marina	Dec. 31, 2013 San Diego Marriott Mission Valley	Dec. 31, 2013 San Francisco Marriott Fisherman Wharf	Dec. 31, 2013 San Francisco Marriott Marquis	Dec. 31, 2013 San Ramon Marriott	Dec. 31, 2013 Santa Clara Marriott	Dec. 31, 2013 Scottsdale Marriott At Mcdowell Mountains	Dec. 31, 2013 Scottsdale Marriott Suites Old Town	Dec. 31, 2013 Seattle Airport Marriott	Dec. 31, 2013 Sheraton Boston Hotel	Dec. 31, 2013 Sheraton Indianapolis Hotel At Keystone Crossing	Dec. 31, 2013 Sheraton Needham Hotel	Dec. 31, 2013 Sheraton New York Times Square Hotel	Dec. 31, 2013 Sheraton Parsippany Hotel	Dec. 31, 2013 Sheraton San Diego Hotel And Marina	Dec. 31, 2013 Sheraton Santiago Hotel Convention Center	Dec. 31, 2013 Swissotel Chicago	Dec. 31, 2013 Tampa Airport Marriott	Dec. 31, 2013 Tampa Marriott Waterside Hotel And Marina	Dec. 31, 2013 Fairmont Kea Lani Maui	Dec. 31, 2013 Ritz Carlton Amelialsland	Dec. 31, 2013 Ritz Carlton Buckhead	Dec. 31, 2013 Ritz Carlton Marina Del Rey	Dec. 31, 2013 Ritz Carlton Naples	Dec. 31, 2013 Ritz Carlton Naples Golf Resort	Dec. 31, 2013 Ritz Carlton Phoenix	Dec. 31, 2013 Ritz Carlton Tysons Corner	Dec. 31, 2013 St Regis Houston	Dec. 31, 2013 Westin Buckhead Atlanta	Dec. 31, 2013 Westin Chicago River North	Dec. 31, 2013 Westin Cincinnati	Dec. 31, 2013 Westin Denver Downtown	Dec. 31, 2013 Westin Georgetown Washington D C	Dec. 31, 2013 Westin Indianapolis	Dec. 31, 2013 Westin Kierland Resort Spa	Dec. 31, 2013 Westin Los Angeles Airport	Dec. 31, 2013 Westin Mission Hills Resort Spa	Dec. 31, 2013 Westin New York Grand Central	Dec. 31, 2013 Westin Seattle	Dec. 31, 2013 Westin South Coast Plaza Costa Mesa	Dec. 31, 2013 Westin Waltham Boston	Dec. 31, 2013 Toronto Marriott Downtown Eaton Center Hotel	Dec. 31, 2013 W New York	Dec. 31, 2013 W New York Union Square	Dec. 31, 2013 W Seattle	Dec. 31, 2013 Washington Dulles Airport Marriott	Dec. 31, 2013 Westfields Marriott Washington Dulles	Dec. 31, 2013 Total Hotels	Dec. 31, 2013 Other Property
Real Estate And Accumulated Depreciation [Line Items]
Mortgage debt	$ 709	$ 993			$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 150	$ 71	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 100	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 100	$ 87	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 201	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 709	$ 0
Initial Costs, Land	1,987				15	0	0	5	4	2	5	0	3	7	3	2	4	6	0	0	26	7	8	154	0	0	0	2	0	0	12	18	92	11	16	40	16	13	13	4	11	26	0	0	0	0	0	20	0	0	0	16	19	49	0	6	11	34	18	0	0	3	6	0	0	7	0	4	6	0	0	0	8	3	3	42	3	5	346	8	0	19	29	0	0	55	25	14	0	19	22	10	0	6	5	33	0	0	16	12	100	0	40	156	39	0	9	0	138	48	11	0	7	1,966	21
Initial Costs, Buildings & Improvements	9,363				7	26	203	18	26	14	36	53	18	27	14	30	20	26	12	86	60	22	88	247	19	62	136	10	10	19	120	84	212	78	119	230	21	143	29	26	35	98	8	38	548	29	13	24	16	27	27	96	79	552	30	14	13	105	157	20	42	144	29	86	45	15	202	23	20	278	22	39	48	20	42	262	51	27	409	30	328	11	132	9	84	294	115	81	52	126	10	63	89	33	84	116	54	89	80	100	280	102	47	152	175	46	59	27	102	145	125	3	32	9,359	4
Subsequent Costs Capitalized	4,093				35	9	64	17	54	7	9	26	7	14	5	8	27	29	11	8	21	12	23	12	13	101	4	20	39	19	0	6	28	21	53	38	25	132	2	22	15	44	25	31	27	26	24	25	37	30	42	112	39	178	26	9	110	(3)	356	12	17	110	11	83	17	1	278	15	20	110	21	55	7	10	20	50	27	12	183	17	31	8	82	22	14	34	69	63	26	129	67	8	19	18	25	2	13	12	14	8	21	15	(41)	75	23	10	11	19	64	7	5	37	16	4,076	17
Foreign Currency Adjustment	(35)				0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	(30)	0	0	0	0	0	0	0	0	0	0	0	(12)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	11	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	(1)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	(32)	(3)
Land	1,973				15	0	0	5	4	2	5	0	3	7	2	2	4	6	0	0	27	7	8	154	0	0	0	2	0	0	12	19	81	12	20	40	16	13	9	6	10	26	0	0	0	0	0	20	0	0	0	16	19	49	0	6	8	34	29	0	0	11	6	0	0	7	0	4	6	0		0	8	3	3	42	3	5	346	8	0	19	30	0	11	55	25	15	0	21	22	10	0	6	6	33		0	16	12	100	0	13	156	39	0	9	0	138	48	11	0	7	1,952	21
Buildings & Improvements	13,435				42	35	267	35	80	21	45	79	25	41	20	38	47	55	23	94	80	34	111	259	32	163	110	30	49	38	120	89	251	98	168	268	46	275	23	46	51	142	33	69	575	55	37	49	53	57	69	208	118	730	56	23	126	113	502	32	59	246	40	169	62	16	480	38	40	388	43	94	55	30	62	312	78	39	592	47	359	18	213	31	98	328	184	143	78	253	77	71	108	51	108	118	67	101	94	108	301	117	33	227	198	56	70	46	166	152	130	40	48	13,417	18
Total	15,408	15,661	15,020	13,749	57	35	267	40	84	23	50	79	28	48	22	40	51	61	23	94	107	41	119	413	32	163	110	32	49	38	132	108	332	110	188	308	62	288	32	52	61	168	33	69	575	55	37	69	53	57	69	224	137	779	56	29	134	147	531	32	59	257	46	169	62	23	480	42	46	388	43	94	63	33	65	354	81	44	938	55	359	37	243	31	109	383	209	158	78	274	99	81	108	57	114	151	67	101	110	120	401	117	46	383	237	56	79	46	304	200	141	40	55	15,369	39
Accumulated Depreciation	$ 5,048	$ 4,768	$ 4,306	$ 3,834	$ 25	$ 17	$ 96	$ 20	$ 50	$ 11	$ 19	$ 40	$ 13	$ 22	$ 14	$ 16	$ 26	$ 29	$ 16	$ 24	$ 37	$ 17	$ 46	$ 14	$ 18	$ 86	$ 11	$ 16	$ 42	$ 23	$ 2	$ 44	$ 74	$ 41	$ 69	$ 62	$ 28	$ 122	$ 2	$ 29	$ 37	$ 64	$ 29	$ 62	$ 54	$ 28	$ 20	$ 27	$ 26	$ 35	$ 48	$ 117	$ 60	$ 492	$ 29	$ 13	$ 73	$ 10	$ 204	$ 15	$ 25	$ 109	$ 18	$ 77	$ 33	$ 4	$ 198	$ 19	$ 23	$ 219	$ 20	$ 75	$ 13	$ 14	$ 39	$ 71	$ 16	$ 9	$ 131	$ 12	$ 76	$ 7	$ 73	$ 24	$ 37	$ 84	$ 76	$ 72	$ 41	$ 122	$ 22	$ 31	$ 47	$ 15	$ 44	$ 10	$ 17	$ 22	$ 23	$ 24	$ 57	$ 28	$ 17	$ 32	$ 39	$ 25	$ 16	$ 25	$ 43	$ 14	$ 25	$ 33	$ 27	$ 5,037	$ 11
Date of Completion of Construction																																																																																					2000						2002
Date Acquired					1976	1996	2002	1996	1998	1989	1997	1997	1996	1992	1989	1998	1996	1994	1983	2004	1998	1993	1998	2012	1983	1997	2011	1986	1984	1998	2013	1998	2003	1998	1998	2006	1990	1997	2010	1994	1996	2003	1993	1997	2011	1997	1995	1994	1998	1998	1986	1996	1997	1986	1984	1975	1975	2011	1997	1987	1995	1995	1996	1996	1995	2006	1996	1998	1994	1989	1996	1989	2004	1988	1998	2006	2006	1986	2006	2006	2006	2006	1998	2000		2003	1998	1996	1997	1996	—	1998	1998	2006	40	40	40	40	40	40	40	40	40	40	40	40	40	40	40	40	40	40	40		40
Depreciation Life					40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	33 years	40 years	40 years	31 years	40 years	40 years	40 years	34 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	35 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	35 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years		40 years